Swivel-type hoist ring

ABSTRACT

A hoist ring assembly which includes a base block having a bore therein, extending from the front to the back thereof, a screw seated in the bore having a threaded portion which extends beyond the block, the block being adapted to revolve around that portion of the screw seated in the bore, and a hoist ring mounted in the block above the bore and adapted for swiveling movement on an axis transverse to that of the bore.

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INVENTOR LELAND F. BLATT WM. Amy@ ATTORNEYS swrvEL-TYPE uors'r RINGBACKGROUND OF THE INVENTION l. Field of the Invention This inventionrelates to a hoist ring assembly which can be attached to a tool, die,fixture or other structure for the purpose of safely lifting, loading ortransporting the structure.

2. The Prior Art ln the prior art, hoist rings have been conventionallyanchored into the piece of equipment to be moved. When a hook or cablewas applied to the ring, the ring was unable to align itself in thedirection of the pulling or lifting force and as a result thereof, highshear and bending moments were inflicted upon the ring. This conditioneventually might cause failure of the ring with a resultant danger toloss of life and limb as a consequence of whatever was being lifted bythe ring, being dropped.

A new type hoist ring assembly has now been developed which enables thering to align itself in the direction of the pulling or lifting forceindependent of how it is rigged and as a result thereof high shear andbending moments on the ring have been substantially eliminated.

lt is therefore an object of this invention to provide the hoist ringassembly so constructed that it aligns itself in the direction of thepulling or lifting force and substantially eliminates high shear andbending moments from arising.

Other objects and features of the invention will become apparent fromthe more detailed description which follows and from the accompanyingdrawings, in which:

FIG. l is a side elevational view of the assembly of the invention;

FIG. 2 is a front elevational view of the assembly of the invention; and

FIG. 3 is a perspective view showing the hoist ring assembly m use.

DESCRIPTION OF THE PREFERRED EMBODIMENT The assembly l of this inventioncomprises a base block 12, preferably cast in one piece, having a bore14 in the lower portion thereof extending from front to back. The borehas a section of enlarged diameter 16 on the front end thereof. Ashoulder 18 is formed between the section of enlarged diameter 16 andthe rest ofthe bore 14. The block 12 has a recess 20 located above thebore 14 which is alignedin a direction transverse to the direction ofthe axis of the bore 14. A retaining ring 22 is situated within therecess. The retaining n'ng 22 has a somewhat horseshoe shape in planview with a substantially straight member 24 closing the ends of thehorseshoe. The member 24 is situated in the recess 20.

After the ring 22 is placed in the recess 20, a plate 26 is welded inplace between opposed walls of the recess to retain the ring 22 in placein the recess.

A shoulder screw 28 is seated in the bore 14. The screw 28 has a head 30adapted to tit within the enlarged diameter section 16 of the bore 14.The bottom of the head 30 is in abutting relationship with the shoulder18 between the enlarged diameter section 16 of the bore 14 and the restof the bore 14. The screw 28 has a reduced diameter threaded bodyportion 32 which extends beyond the bore 14 and which is adapted toscrew into a piece of equipment to be lifted. A shoulder 34 is fonned atthe junction of the reduced diameter section 32 and that portion of thescrew 28 in the bore 14. The screw 28 is retained in the bore 14 bymeans of metal deposits or stakes 36 which are deposited thereon afterthe screw 28 is inserted into the bore 14. Other means can also be used.

As can readily be visualized from FIGS. 1 and 2, the block 12 can beswiveled about the' axis of the bore 14 and the ring 22 can be swiveledabout the axis of the recess 20 which is transverse to that of the axisof the bore 14.

When a hook or cable is applied to the ring, as seen in FIG. 3, theblock 12 swivels around the screw 28 and aligns itself in the directionof the pulling'or lifting force on it, and the ring 22 also alignsitself in the direction of the pulling or lifting force. As aconsequence, high shear and bending moments which are normally prevalentin stationery, screw-in lifting rings, are substantially eliminated.

What is claimed is:

1. A hoist ring assembly which comprises a block member having atransverse bore therein; an arcuate radial recess in said block memberabove said transverse bore and extending straight across the block in adirection transverse or normal to said bore, a hoist ring mounted insaid arcuate recess having a swiveling axis normal to the axis of saidtransverse bore, a screw seated in and extending through and beyond saidtransverse bore having threads on that portion extending beyond saidbore, whereby, when the threaded portion of said screw is threaded intoan object to be hoisted, said block member is capable of swivelingmovement about said screw and said ring is capable of swiveling movementabout said axis normal to that of said screw; said arcuate radial recessextending in longitudinal direction opening through both lateral sidesof said block member; and said h oist ring having a straight portion fordisposal within said straight across arcuate radial recess, saidstraight portion permitting swiveling movement of said hoist ring withinsaid recess through substantially 360; said bore having an enlargedcounterbore section at the outer end thereof, a shoulder defined betweensaid enlarged counterbore section and the rest of said bore, and whereinsaid screw has an enlarged head seated and nested entirely within saidenlarged counterbore section, bearing against said shoulder; saidarcuate radial recess in said block above said bore being provided inthe backside thereof and wherein said hoist ring is retained in saidradial recess by means of a plate welded to and extending betweenopposed sidewalls of said radial recess; said bore extending from thefront to the back of said block member and wherein said arcuate radialrecess has an axis offset to the axis of said bore.

1. A hoist ring assembly which comprises a block member having atransverse bore therein; an arcuate radial recess in said block memberabove said transverse bore and extending straight across the block in adirection transverse or normal to said bore, a hoist ring mounted insaid arcuate recess having a swiveling axis normal to the axis of saidtransverse bore, a screw seated in and extending through and beyond saidtransverse bore having threads on that portion extending beyond saidbore, whereby, when the threaded portion of said screw is threaded intoan object to be hoisted, said block member is capable of swivelingmovement about said screw and said ring is capable of swiveling movementabout said axis normal to that of said screw; said arcuate radial recessextending in longitudinal direction opening through both lateral sidesof said block member; and said hoist ring having a straight portion fordisposal within said straight across arcuate radial recess, saidstraight portion permitting swiveling movement of said hoist ring withinsaid recess through substantially 360*; said bore having an enlargedcounterbore section at the outer end thereof, a shoulder defined betweensaid enlarged counterbore section and the rest of said bore, and whereinsaid screw has an enlarged head seated and nested entirely within saidenlarged counterbore section, bearing against said shoulder; saidarcuate radial recess in said block above said bore being provided inthe backside thereof and wherein said hoist ring is retained in saidradial recess by means of a plate welded to and extending betweenopposed sidewalls of said radial recess; said bore extending from thefront to the back of said block member and wherein said arcuate radialrecess has an axis 90* offset to the axis of said bore.